# Proto.Actor

Proto Actor - Ultra fast distributed actors for Go, C# and Java/Kotlin

Repository: https://github.com/asynkron/protoactor-go
Canonical: https://ross.abutalabs.com/products/protoactor
Homepage: http://proto.actor
Language: Go
License: Apache-2.0
License Family: permissive
Topics: grpc, actor-model, actors, cross-platform, protobuf, akka, clustering, distributed-computing, go, distributed-systems, golang
Last push: 2026-04-08T21:41:59+00:00
Link (homepage): http://proto.actor
Link (site_page): https://proto.actor/docs/intro
Link (site_page): https://proto.actor/docs/Products/bokabra
Link (site_page): https://proto.actor/docs/Products/inmem

## Health v2 (maintenance only)
Score: 57/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 76, release rhythm 8, longevity 100
- inputs: {"age_days": 3790, "days_push": 147, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 5492, forks 575 (observed 2026-08-28T04:09:19.830298+00:00)

## What it is
Proto.Actor is an ultra-fast, cross-platform actor framework for Go, C#/.NET, and Java/Kotlin for building distributed, message-driven systems. It provides clustering, virtual actors, supervision, and persistence, built on gRPC and Protobuf with a minimalistic API.

## Use cases
- build distributed actor systems in Go or .NET
- cluster actors across nodes with virtual actor placement
- pass millions of messages per second between nodes
- replace Akka or Akka.NET with a lighter runtime
- model stateful microservices with supervision and persistence
- serialize messages explicitly with protobuf over gRPC

## When to choose
- you need high-throughput message passing between distributed nodes
- you want a minimalistic actor API without heavy container configuration
- you work in Go or .NET and want cross-platform actor interop
- you prefer building on gRPC and protobuf instead of custom transports

## When to avoid
- you need a fully stable 1.0 API in Go (still beta, API may change)
- you need the full Akka ecosystem of modules and tooling
- your project is single-node and doesn't need distributed actors

## Facets
- artifact type: framework
- maturity: active
- function: rpc, serialization, message-queue, concurrency, microservices
- domain: microservices, backend, developer-tools
- platform: go, dotnet, cross-platform, jvm
- tags: actor-model, clustering, virtual-actors, grpc, protobuf, akka-alternative, distributed-actors

## Member repositories
- asynkron/protoactor-go (main) score 57
- asynkron/protoactor-dotnet (main) score 59

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:09:19.830298+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-29T17:56:20.002470+00:00, confidence not recorded.
  - readme: https://github.com/asynkron/protoactor-go (fetched 2026-08-28T04:09:19.830298+00:00, sha 2679c220b00a)
  - homepage: http://proto.actor (fetched 2026-08-29T08:51:32.349139+00:00, sha 5646f77eb65c)
  - site_page: https://proto.actor/docs/intro (fetched 2026-08-29T08:51:32.358746+00:00, sha 4e1fba247ebe)
  - site_page: https://proto.actor/docs/Products/bokabra (fetched 2026-08-29T08:51:32.361070+00:00, sha ad9c01f1f9a3)
  - site_page: https://proto.actor/docs/Products/inmem (fetched 2026-08-29T08:51:32.363047+00:00, sha 7967571abf09)
- Data as of 2026-08-30T08:39:29.467469+00:00.